Itchy Anus blood in stool

I am a fit and healthy 31 year old female, and have noticed that for the past few months my anus has been iterating, and causing me to itch. I have somewhat tried to ignored this embarrassing situation. After checking myself in the mirror I see nothing out of the ordinary. I have also noticed a small trace of blood in my stool on and off for the past week. I realize hemorrhoids could be internal as well as external... I'm so confused. Please can you direct me with your medical knowledge? Thank you for your time.